<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
</head>
<body>
<script type="text/javascript">
    // 创建script标签
    function addScriptTag(src) {
        var script = document.createElement('script')
        script.setAttribute('type','text/javascript')
        script.src = src;
        document.body.appendChild(script)
    }
</script>
</body>
</html>